Infrared spectra and optical constants of astronomical ices: III. Propane, propylene, and propyne

RL Hudson, PA Gerakines, YY Yarnall, RT Coones - Icarus, 2021 - Elsevier
Infrared (IR) spectra of the hydrocarbon ices C 3 H 8 (propane), C 3 H 6 (propylene,
propene), and C 3 H 4 (propyne, methylacetylene) are relevant to the study of the low …

Chemical Evolution of CO2 Ices under Processing by Ionizing Radiation: Characterization of Nonobserved Species and Chemical Equilibrium Phase with the …

S Pilling, GA Carvalho, WRM Rocha - The Astrophysical Journal, 2022 - iopscience.iop.org
Astrophysical ices are being exposed to ionizing radiation in space environments, which
trigger new reactions and desorption processes. In the lab, such processing by radiation has …

Characterization of acetonitrile ice irradiated by X-rays employing the procoda code – I. Effective rate constants and abundances at chemical equilibrium

GA Carvalho, S Pilling… - Monthly Notices of the …, 2022 - academic.oup.com
In this work, the chemical evolution of pure acetonitrile ice at 13 K irradiated with broad-band
soft X-rays (from 6 eV to 2 keV) is determined by using a computational methodology …

Untangling the methane chemistry in interstellar and solar system ices toward ionizing radiation: a combined infrared and reflectron time-of-flight analysis

MJ Abplanalp, BM Jones, RI Kaiser - Physical Chemistry Chemical …, 2018 - pubs.rsc.org
Pure methane (CH4/CD4) ices were exposed to three ionizing radiation sources at 5.5 K
under ultrahigh vacuum conditions to compare the complex hydrocarbon spectrum …

Mapping the evolution of pure CO2 ices irradiated by ions, UV, and electrons using the upgraded PROCODA code (employing an effective rate constant ordering by …

S Pilling, WRM Rocha, GA Carvalho… - Advances in Space …, 2023 - Elsevier
Chemical reactions and desorption processes are being triggered by incoming ionizing
radiation over astrophysical ices in cold space environments. The quantification of these …

Chemical evolution of electron-bombarded crystalline water ices at different temperatures using the procoda code

S Pilling, CH da Silveira… - Monthly Notices of the …, 2023 - academic.oup.com
Water ices are a common component of cold space environments, including molecular and
protostellar clouds, and the frozen surfaces of moons, planets, and comets. When exposed …

Energetic processing of N2: CH4 ices employing X-Rays and swift ions: implications for icy bodies in the outer solar system

FA Vasconcelos, S Pilling, WRM Rocha… - The Astrophysical …, 2017 - iopscience.iop.org
We experimentally address in this paper the physicochemical effects induced by ionizing
photons (energies from 6 to 2000 eV) and swift heavy ions (15.7 MeV 16 O 5+) in the icy …

SO 3 formation from the X-ray photolysis of SO 2 astrophysical ice analogues: FTIR spectroscopy and thermodynamic investigations

V de Souza Bonfim, RB de Castilho… - Physical Chemistry …, 2017 - pubs.rsc.org
In this combined experimental–theoretical work we focus on the physical and chemical
changes induced by soft X-rays on sulfur dioxide (SO2) ice at a very low temperature, in an …

Photochemistry and desorption induced by X-rays in water rich astrophysical ice analogs: implications for the moon Enceladus and other frozen space environments

S Pilling, WRM Rocha, FM Freitas, PA Da Silva - RSC advances, 2019 - pubs.rsc.org
Soft X-rays are an important agent for chemical processing in the Solar System and in the
interstellar medium. The photolysis and photodesorption processes of H2O-rich ices …

Processing of N2O ice by fast ions: implications on nitrogen chemistry in cold astrophysical environments

GC Almeida, S Pilling, ALF De Barros… - Monthly Notices of …, 2017 - academic.oup.com
Nitrous oxide, N2O, is found in the interstellar medium associated with dense molecular
clouds and its abundance is explained by active chemistry occurring on N2 rich ice surfaces …